I have did it via below css,
background-color: #fff !important;
box-shadow: 0 0 10px #fff !important;
border: 2px solid #206080 !important;
font-weight: bold !important;
But i cannot make the label bold in chart.....How to do that?????
<rich:chartXAxis label="Year" id="yearxaxis" style="color:black !important;"/>
<rich:chartYAxis label="Total Visitor Count" style="color:black !important;"/>
You mean the label that says "MAR-2015" and so on? That's part of the drawing, you cannot style it with CSS. I don't know if the plugin supports bold fonts, in any case you should check flotcharts docs.
By Changing the css class .chart-title now the label is bold.
Its working for this problem.
Thank you Michal Petrov.